[Brainwashing, Corruption]

"M-Mother..."

Lillie could barely stand after what had happened. Everything had happened so quickly that she was left more than speechless. Of course she would be, considering everything she had been forced to go through over the last few days. All because she wanted to keep Nebby safe from harm.

She had seen her Mother descend into madness. She had seen her take off through one of those wormholes. And now that they finally tried to confront her, her and her friend Elio, the two of them were forced to watch her merge with one of those Ultra Beasts that she had such an obsession with. And as that... 'Mother Beast' came at them with all of her Pokemon in tow, they tried to put up a valiant fight.

They were swept aside in a matter of seconds. Leaving them laying on the ground, their bodies still trembling as they processed what that thing that had once been her Mother had done to them...

"Children should listen to their Mothers. Always." Lusamine, completely merged with the Nihilego that she had been chasing ever since it first appeared before her, licked her lips as she was able to control both her own body and the Nihilego-like Mother Beast that had formed on top of her when the two merged. Allowing her to grin wildly as she extended her large tentacular limbs towards those two youths that had tried to stop her. Those children that tried to go against their mother...

Elio tried to roll out of the way of that tentacle. He really did. But getting rammed into by a massive jellyfish-woman had done a number on his body. He had almost won that battle, but then she rammed into him, Lillie and their remaining Pokemon, sending everything spiralling out of their control. Especially now that he felt a terrible sensation spreading through him, courtesy of the prick caused by the tentacle touching him.

"Mother, plea-" Lillie didn't get a chance. In fact, the tentacle made sure to prick her straight on the tongue in response to her attempt to talk back towards her Mother. The sensitive nature of that muscle caused her body to tremble more than it ever had before, her legs quivering with every passing moment...

Both of the young trainers that had tried to stand up and fight to free Lusamine from the Ultra Beast's influence quickly felt their bodies heating up. They could feel this unnatural sensation spreading through them. Especially Lillie, who could feel her tongue unnaturally trying to lick her lips every few seconds. It was like a brand new heat was pouring through her, and she couldn't sit still. She needed stimuli...

"Never again will you two try to disobey me. Especially not you, Lillie..!" Lusamine cried out as she wrapped her tentacular appendages around the two youths, squeezing them nice and tight as she pulled them both closer to her. Not close enough to the point where they could touch her main body. But close enough so that they could see the toxin-induced madness in her eyes.

Elio trembled with every passing moment. The tentacle compressing his body was causing the toxin to pour throughout him, and it was making it harder and harder to think straight. He needed... H-He needed to spread... N-No, he couldn't spread! He was a human, he wasn't... He wasn't spreading... H-He...

"N-Need... Need to make more..." Lillie couldn't control her lips thanks to the toxin in her tongue. Though her thoughts were trying to keep control of her body, the toxin from the Mother Beast was controlling her words. "Need to make more... More... Propogate..." She muttered in a haze. All while her body trembled more and more, and a soft trail of clear liquid started to pour down her thigh. The toxin was spreading further and further thorugh her. All while her thoughts were putting up a valiant effort, considering how badly it had already taken over her ability to speak.

Lusamine just kept on grinning. "Let it flow through you. You'll both be such perfect children. Never disobeying. Always spreading yourselves around. Filling this world with more of us. Filling this world... Filling it..!" She cried out as the parts of her still-human form trembled in delight. She could feel the arousal climbing. She loved every moment of it. All because she was propogating, just like the toxin inside her told her to do!

"F-Fill the world..." Elio muttered, his eyes starting to take on a deep shade of yellow, just like the maddened eyes of that malicious Mother. Even though they weren't related, he could feel the pressure put on by her. He wanted to... He wanted to do exactly what she told him. So she could be happy and satisfied. So she could praise him for doing good...

"Fill the world with us..!" Lillie cried out as her eyes started to shift colors as well. Her thoughts were being repressed thanks to the words being forced out from her lips. She wanted nothing more than to stop all of this, but her mind was being actively pushed further and further into the back. Her thoughts, her wants, her needs... They didn't matter. The only thing that mattered to her subconscious was what she was saying. And that was propogating and filling the world with more Nihilego..!

Lusamine let out an almost orgasmic moan. She needed to make sure that this propogation went as smoothly as possible. She needed to make sure that it was going to result in the two most perfect children. Which meant that she had to deal with them in the most intimate way possible. And she knew exactly how that would have to happen, as she momentarily let go of Elio...

Just so she could use those two tentacles of hers to shove Lillie straight into her body, forcing her to occupy the inside of this jellyfish-like form with her. Making her a temporary component of the fusion between Ultra Beast and Human. And once she was forcibly snuggled nice and tightly into that form, both of those tentacles as well as every other tentacle that the Mother Beast had to offer wrapped around the toxin-filled boy...

Elio could barely move inside this proverbial coffin. And not only that, thanks to how tightly he was packed in between these wriggly appendages, it was easy for every single possible needle to poke straight into him. Pouring even more of the toxin into his body, and corrupting him even further. To the point where his hips started to actively thrust forward as his hair slowly turned from a soft black to a deeper shade just like what had happened to Lusamine.

Lillie wasn't much luckier in that regard. Since she was stuffed straight into the Mother Beast, every single bit of air that she breathed in was laced with toxin. In fact, the air itself was toxin. Her eyes were rolling into the back of her head as she tried to struggle ever so slightly. But she couldn't do much before her mind was being polluted more and more. Thoughts of propogatiing. Thoughts of filling the world with her. Thoughts of turning more humans into hybrids like her and Mother... Mother... Mother..!

Her eyes snapped back to attention as she looked straight at her black-haired matron. Lusamine was staring right back at her, licking her lips eagerly as she saw how delicious her daughter was. They were both turned on beyond belief thanks to all of the toxin pouring through them, and since they had already fallen so deep down the proverbial rabbit hole, nothing would be able to stop them from falling even deeper.

Lusamine and Lillie locked lips, all as Lillie's hair started to spread back out and look just like how her mom had originally styled it. After all, she was her Mother's perfect little daughter. Which meant that she needed to look just like a Nihilego, as she had always wanted her to. And once that hair spread all the way out, it started taking on the exact same black shade with those blonde streaks pouring down. She needed to be perfect. And the more toxin poured into her system, the more she turned into a complete hybrid just like her Mother.

Their bodies pushed together. With every passing moment, Lillie was becoming more like her mother. In more ways than she would've originally expected. The specific type of toxin pouring around inside of the Mother Beast was designed to keep the maternal features of Lusamine at an all time high. Which meant that the younger girl's body quickly started to mature. Especially when it came to her bosom. And that was rubbing off on her Mother just the same, as both of them pressed their breasts up against one another as cup by cup poured on by. Quicker and quicker, their sizes grew...

Until they were both more than ready to feed several more generations of Nihilegos. All while Lillie's thoughts had been completely consumed by the need to propogate. Her existence as Lillie had been all but smothered by the sheer level of toxin inside her system. She was little more than a Mother Beast in the making, just needing time to bond with her own Nihilego at this point...

In fact, her sheer compatibility with the Mother Beast meant that Lusamine couldn't keep her inside her body any longer. She had to push her out, letting the corrupted girl fall to the ground with juices pouring off her body. She looked like she had just been reborn, even though her body was almost as matured as her dear Mother. All while she just kept on muttering that single word that had been on her lips since her tongue had been filled with toxin. "Propogate..."

Elio wasn't in much better shape inside those tentacles. He was trembling and thrusting wildly, trying to obey the instincts pouring through him. It felt too good. He wanted to propogate. He wanted to spread. Anything to make himself useful to the toxin inside him. His changed had already gotten so far along that he was practically about to turn into an Ultra Beast without even bonding with another, that was how much had been pumped into him.

Indeed, once he had been released, his body just couldn't stop thrusting. He had an unnaturally strong need to breed and propogate. In fact, the sheer amount of toxin having been pumped into him caused his pants to shred as his cock had thickened, all while that tip now drooled the same sort of toxin. He was well and truly corrupted into somebody just as mad as his... Mother..!

Elio cried out in delight as some of that corruptive toxin squirted out, and drooled down his chin as well. All while the sound of his need started attracting another Nihilego, which carefully and slowly descended towards him. He didn't make any attempt to stop it, nor would he have the presence of mind to do so at this point...

Lillie was in much the same boat. Hearing her fellow corrupted human cry out had caused her body to tremble and squirt out some of her own toxin, the sound of her mild climax attracting a Nihilego as well. Unlike Elio, who just let it sink onto him and slurp him up until he looked like a much smaller yet more mobile version of the Mother Beast, she eagerly reached up and practically wore the Nihilego as it came down on her.

Another moan left her lips as they were given the same black treatment as her hair, her eyes flashing with the same madness as her Mother's. In fact, her body was nearly a complete copy of her Mother's at this point, the only difference being the size of their two bodies. She still had more to go before she'd be a proper Mother Beast, but she was definitely on the way there...

Lusamine laughed from the very depths of her cold twisted heart. All while reaching forward with her now-free arms, and pulling at the fabric of Ultra Space. All to open up another Wormhole, one that would lead back to that world she had once called home.

She, along with her brand new perfect children, would make sure to propogate it with their kin... And then, to make sure that nothing would get in her way, she'd have to finish off her dear son...

All for the sake of turning the entire world into nothing but those perfect children of hers.